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X - Possible homology level

H - Homology level

T - Topology level

F - Family level

* - Provisional representative


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Evolutionary classification of protein domain structures

alpha arraysalpha-helix arrays with mainly perpendicular helices

alpha bundlesalpha-helix bundles with mainly parallel helices

alpha superhelicesrepeating alpha-helix hairpins form a superhelix

alpha duplicates or obligate multimersalpha duplicates or monomers associate together to form a compact domain

alpha complex topologyalpha domain with complex and unique topology that cannot be described as array or bundle or superhelix

X: alpha-helical domain in beta-lactamase/transpeptidase-like proteins
H: alpha-helical domain in beta-lactamase/transpeptidase-like proteins
T: alpha-helical domain in beta-lactamase/transpeptidase-like proteins
F: Transpeptidase

PF00905 CL0013

Representatives:

e1k55A1[A:63-160] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA LACTAMASE OXA-10 ; ligands: EDO,SO4 ; X-RAY DIFFRACTION 1.39Å

e1k38A1[A:63-160] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

BETA-LACTAMASE OXA-2 ; ligands: FMT ; X-RAY DIFFRACTION 1.5Å

e1m6kA1[A:63-166] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-LACTAMASE OXA-1 ; ligands: MPD ; X-RAY DIFFRACTION 1.5Å

e3udfA3[A:431-530] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Penicillin-binding protein 1a ; ligands: MES ; X-RAY DIFFRACTION 1.7Å

e1vqqA1[A:400-525] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

PENICILLIN-BINDING PROTEIN MECA, LOW-AFFINITY ; X-RAY DIFFRACTION 1.8Å

e4s2nB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ligands: NXL ; X-RAY DIFFRACTION 2.00Å

e4s2nC1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ligands: NXL ; X-RAY DIFFRACTION 2.00Å

e4s2nD2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ligands: NXL ; X-RAY DIFFRACTION 2.00Å

e4s2pA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; X-RAY DIFFRACTION 1.70Å

e4s2pB2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; X-RAY DIFFRACTION 1.70Å

e4x55A1[A:74-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase OXA-225 ; ligands: CTJ ; X-RAY DIFFRACTION 1.941Å

e4cjnA2[A:399-524] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PENICILLIN BINDING PROTEIN 2 PRIME ; X-RAY DIFFRACTION 1.95Å

e4s2oB2[B:62-159] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ligands: CO,NXL ; X-RAY DIFFRACTION 1.70Å

e4s2kB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ligands: NXL ; X-RAY DIFFRACTION 2.1Å

e4s2lA1[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 1.72Å

e4s2lB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 1.72Å

e4s2mA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: IOD ; X-RAY DIFFRACTION 2.870Å

e4s2mB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: IOD ; X-RAY DIFFRACTION 2.870Å

e4s2mC1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: IOD ; X-RAY DIFFRACTION 2.870Å

e4s2mD1[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: IOD ; X-RAY DIFFRACTION 2.870Å

e4wz5C2[C:62-159] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase OXA-10 ; ligands: CO2,SO4 ; X-RAY DIFFRACTION 1.60Å

e4wz5D1[D:62-159] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase OXA-10 ; ligands: CO2,SO4 ; X-RAY DIFFRACTION 1.60Å

e4wz5A2[A:62-159] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase OXA-10 ; ligands: 3VU,SO4 ; X-RAY DIFFRACTION 1.60Å

e4wz5B1[B:62-159] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase OXA-10 ; ligands: 3VU,SO4 ; X-RAY DIFFRACTION 1.60Å

e4zdxA1[A:76-172] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: TOE ; X-RAY DIFFRACTION 2.0Å

e5dvyA5[A:418-543] Image Pymol Jmol Links: PDB, SCOP, CATH

Penicillin binding protein 2 prime ; ligands: SO4,TRS ; X-RAY DIFFRACTION 2.95Å

e5e2fB2[B:69-169] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase YbxI ; X-RAY DIFFRACTION 1.3Å

e5e31A5[A:418-543] Image Pymol Jmol Links: PDB, SCOP, CATH

Penicillin binding protein 2 prime ; X-RAY DIFFRACTION 2.30Å

e5e2fA1[A:69-169] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase YbxI ; ligands: EDO ; X-RAY DIFFRACTION 1.3Å

e5ctmA1[A:94-194] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,FLC ; X-RAY DIFFRACTION 1.00Å

e5ctmB2[B:94-194] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,FLC ; X-RAY DIFFRACTION 1.00Å

e5ctnA1[A:94-194] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 5R7,FLC ; X-RAY DIFFRACTION 1.35Å

e5ctnB1[B:94-194] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 5R7 ; X-RAY DIFFRACTION 1.35Å

e5bohA2[A:80-175] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 1.80Å

e4y0oA2[A:80-175] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 2.37Å

e4y0tA2[A:80-175] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 2.29Å

e4y0tB1[B:80-175] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 2.29Å

e4y0tC1[C:80-175] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 2.29Å

e4y0tD1[D:80-175] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 2.29Å

e4y0uA1[A:80-175] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: ALP ; X-RAY DIFFRACTION 2.60Å

e4y0uB2[B:80-175] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: ALP ; X-RAY DIFFRACTION 2.60Å

e4y0uC2[C:80-175] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: ALP ; X-RAY DIFFRACTION 2.60Å

e4y0uD2[D:80-175] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: ALP ; X-RAY DIFFRACTION 2.60Å

e5faqA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 5VW,CD ; X-RAY DIFFRACTION 1.960Å

e5faqB2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 5VW,CO ; X-RAY DIFFRACTION 1.960Å

e5fasA1[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 5VR,CD,CO ; X-RAY DIFFRACTION 1.74Å

e5fasB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 5VR,CO ; X-RAY DIFFRACTION 1.74Å

e5fatA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 602,CD,CO ; X-RAY DIFFRACTION 2.09Å

e5fatB2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 602,CO ; X-RAY DIFFRACTION 2.09Å

e4yinA2[A:62-158] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: FLC ; X-RAY DIFFRACTION 2.30Å

e4yinB2[B:62-158] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: FLC ; X-RAY DIFFRACTION 2.30Å

e1mwuB4[B:400-525] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

PENICILLIN-BINDING PROTEIN 2A ; ligands: 7EP ; X-RAY DIFFRACTION 2.6Å

e5dtkA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 5F3,EDO ; X-RAY DIFFRACTION 1.478Å

e5dtkB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 5F3,EDO ; X-RAY DIFFRACTION 1.478Å

e5dtkC1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 5F3,EDO ; X-RAY DIFFRACTION 1.478Å

e5dtkD2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 5F3 ; X-RAY DIFFRACTION 1.478Å

e5dtsA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 5F8 ; X-RAY DIFFRACTION 1.94Å

e5dtsB2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 5F8 ; X-RAY DIFFRACTION 1.94Å

e5dtsC2[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 5F8 ; X-RAY DIFFRACTION 1.94Å

e5dtsD2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 5F8 ; X-RAY DIFFRACTION 1.94Å

e5dttA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 2.1Å

e5dttB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 2.1Å

e5dttC1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 5F5 ; X-RAY DIFFRACTION 2.1Å

e5dttD2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 5F5,EDO ; X-RAY DIFFRACTION 2.1Å

e5dvaA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 5FL ; X-RAY DIFFRACTION 2.5Å

e5dvaB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 5FL ; X-RAY DIFFRACTION 2.5Å

e5dvaC1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 5FL ; X-RAY DIFFRACTION 2.5Å

e5dvaD1[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 5FL ; X-RAY DIFFRACTION 2.5Å

e5hapA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 1PE,EDO,NA,PEG,PGE ; X-RAY DIFFRACTION 1.89Å

e5hapB2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,PEG,PG4 ; X-RAY DIFFRACTION 1.89Å

e5haqA1[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: FMT ; X-RAY DIFFRACTION 2.14Å

e5haqB2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: CD,FMT ; X-RAY DIFFRACTION 2.14Å

e5harA1[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: ACT ; X-RAY DIFFRACTION 1.74Å

e5l2fA1[A:76-172] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 4J6 ; X-RAY DIFFRACTION 1.77Å

e5l2fB1[B:76-172] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 4J6 ; X-RAY DIFFRACTION 1.77Å

e5l2fC1[C:76-172] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 4J6,ACT,GOL ; X-RAY DIFFRACTION 1.77Å

e5l2fD2[D:76-172] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 4J6,ACT,GOL ; X-RAY DIFFRACTION 1.77Å

e5fdhA1[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: GOL,SO4 ; X-RAY DIFFRACTION 2.26Å

e5fdhB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: SO4 ; X-RAY DIFFRACTION 2.26Å

e5tg6A1[A:77-173] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: J4W,SO4 ; X-RAY DIFFRACTION 1.78Å

e5tg4A2[A:77-173] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 3GR,JW1,MEE,SO4 ; X-RAY DIFFRACTION 1.44Å

e5tg5A2[A:77-173] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: BCT,JW8,MEE,SO4 ; X-RAY DIFFRACTION 1.75Å

e5tg7A1[A:77-173] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: JW3,MEE,SO4 ; X-RAY DIFFRACTION 2.28Å

e5m18A5[A:399-524] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Penicillin-binding protein 2 ; X-RAY DIFFRACTION 1.98Å

e5m18B1[B:399-524] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Penicillin-binding protein 2 ; X-RAY DIFFRACTION 1.98Å

e5m19A5[A:399-524] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Penicillin-binding protein 2 ; X-RAY DIFFRACTION 2.00Å

e5m19B3[B:399-524] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Penicillin-binding protein 2 ; ligands: CD ; X-RAY DIFFRACTION 2.00Å

e5m1aA2[A:399-524] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Penicillin-binding protein 2 ; X-RAY DIFFRACTION 2.00Å

e5m1aB4[B:399-524] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Penicillin-binding protein 2 ; ligands: CD ; X-RAY DIFFRACTION 2.00Å

e5vfdA1[A:77-173] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 9CM,9CP,SO4 ; X-RAY DIFFRACTION 1.93Å

e5mmyA1[A:62-159] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase OXA-10 ; ligands: CL,DMS,EDO,EPE,GOL ; X-RAY DIFFRACTION 1.880Å

e5mmyB1[B:62-159] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase OXA-10 ; ligands: CO3,GOL ; X-RAY DIFFRACTION 1.880Å

e5mnuA2[A:62-159] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase OXA-10 ; ligands: BR,GOL,NA,NXL ; X-RAY DIFFRACTION 1.56Å

e5mnuB2[B:63-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase OXA-10 ; ligands: BR,GOL,NXL ; X-RAY DIFFRACTION 1.56Å

e5moxA2[A:63-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase OXA-10 ; ligands: CO2,GOL,NXL ; X-RAY DIFFRACTION 1.41Å

e5moxB1[B:63-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase OXA-10 ; ligands: GOL,NA,NXL ; X-RAY DIFFRACTION 1.41Å

e5mozA2[A:63-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase OXA-10 ; ligands: GOL,IOD,NA,NXL ; X-RAY DIFFRACTION 1.34Å

e5mozB2[B:63-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase OXA-10 ; ligands: CL,GOL,IOD,NXL ; X-RAY DIFFRACTION 1.34Å

e5oe2A2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 2.20Å

e5oe2B2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 2.20Å

e5oe2C1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: NA ; X-RAY DIFFRACTION 2.20Å

e5oe2D2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 2.20Å

e5oe0A2[A:66-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 2.05Å

e5oe0B1[B:66-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 2.05Å

e5iy2A1[A:77-173] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase OXA-143 ; ligands: GOL ; X-RAY DIFFRACTION 1.15Å

e5iy2B2[B:77-173] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase OXA-143 ; X-RAY DIFFRACTION 1.15Å

e5odzB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: CL,MG ; X-RAY DIFFRACTION 2.07Å

e5odzD2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: CL,MG,PGE ; X-RAY DIFFRACTION 2.07Å

e5qa5C2[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,L5D ; X-RAY DIFFRACTION 1.95Å

e5wibB1[B:74-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

OXA-239 ; ligands: ID1 ; X-RAY DIFFRACTION 1.868Å

e5qa4A1[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: TI7 ; X-RAY DIFFRACTION 1.95Å

e5qa4B2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: TI7 ; X-RAY DIFFRACTION 1.95Å

e5qa4C1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: TI7 ; X-RAY DIFFRACTION 1.95Å

e5qa4D1[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: TI7 ; X-RAY DIFFRACTION 1.95Å

e5qa5A2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,L5D ; X-RAY DIFFRACTION 1.95Å

e5qa5B2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,L5D ; X-RAY DIFFRACTION 1.95Å

e5qa5D2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,L5D ; X-RAY DIFFRACTION 1.95Å

e5qa6A1[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: AUV,EDO ; X-RAY DIFFRACTION 1.95Å

e5qa6B2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: AUV,EDO ; X-RAY DIFFRACTION 1.95Å

e5qa6C1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: AUV,EDO ; X-RAY DIFFRACTION 1.95Å

e5qa6D2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: AUV,EDO ; X-RAY DIFFRACTION 1.95Å

e5qa7A1[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,IQQ ; X-RAY DIFFRACTION 1.82Å

e5qa7B1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,IQQ ; X-RAY DIFFRACTION 1.82Å

e5qa7C2[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,IQQ ; X-RAY DIFFRACTION 1.82Å

e5qa7D1[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,IQQ ; X-RAY DIFFRACTION 1.82Å

e5qa8A2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: JSX ; X-RAY DIFFRACTION 2.500Å

e5qa8B2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 2.500Å

e5qa8C2[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: JSX ; X-RAY DIFFRACTION 2.500Å

e5qa8D2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: JSX ; X-RAY DIFFRACTION 2.500Å

e5qa9A2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,QKU ; X-RAY DIFFRACTION 1.90Å

e5qa9B2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,QKU ; X-RAY DIFFRACTION 1.90Å

e5qa9C2[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,QKU ; X-RAY DIFFRACTION 1.90Å

e5qa9D2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 1.90Å

e5qaaA1[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EAJ,EDO ; X-RAY DIFFRACTION 1.95Å

e5qaaB2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EAJ,EDO ; X-RAY DIFFRACTION 1.95Å

e5qaaC1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EAJ,EDO ; X-RAY DIFFRACTION 1.95Å

e5qaaD2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EAJ,EDO ; X-RAY DIFFRACTION 1.95Å

e5qabA1[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: XEV ; X-RAY DIFFRACTION 2.15Å

e5qabB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,XEV ; X-RAY DIFFRACTION 2.15Å

e5qabC1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 2.15Å

e5qabD2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: XEV ; X-RAY DIFFRACTION 2.15Å

e5qacA1[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: U4J ; X-RAY DIFFRACTION 2.00Å

e5qacB2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,U4J ; X-RAY DIFFRACTION 2.00Å

e5qacC1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: U4J ; X-RAY DIFFRACTION 2.00Å

e5qacD2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,U4J ; X-RAY DIFFRACTION 2.00Å

e5qadA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,WVV ; X-RAY DIFFRACTION 1.75Å

e5qadB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,WVV ; X-RAY DIFFRACTION 1.75Å

e5qadC2[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,WVV ; X-RAY DIFFRACTION 1.75Å

e5qadD2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,WVV ; X-RAY DIFFRACTION 1.75Å

e5qaeA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: Q4G ; X-RAY DIFFRACTION 2.10Å

e5qaeB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,Q4G ; X-RAY DIFFRACTION 2.10Å

e5qaeC2[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: Q4G ; X-RAY DIFFRACTION 2.10Å

e5qaeD2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: Q4G ; X-RAY DIFFRACTION 2.10Å

e5qafA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: S1D ; X-RAY DIFFRACTION 2.15Å

e5qafB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,S1D ; X-RAY DIFFRACTION 2.15Å

e5qafC2[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: S1D ; X-RAY DIFFRACTION 2.15Å

e5qafD2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: S1D ; X-RAY DIFFRACTION 2.15Å

e5qagA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: Q2R ; X-RAY DIFFRACTION 2.30Å

e5qagB2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: Q2R ; X-RAY DIFFRACTION 2.30Å

e5qagC1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: Q2R ; X-RAY DIFFRACTION 2.30Å

e5qagD1[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,Q2R ; X-RAY DIFFRACTION 2.30Å

e5qahA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,EFX ; X-RAY DIFFRACTION 1.95Å

e5qahB2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,EFX ; X-RAY DIFFRACTION 1.95Å

e5qahC1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,EFX ; X-RAY DIFFRACTION 1.95Å

e5qahD1[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EFX ; X-RAY DIFFRACTION 1.95Å

e5qaiA1[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: DMS,EDO,VM7 ; X-RAY DIFFRACTION 1.90Å

e5qaiB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,VM7 ; X-RAY DIFFRACTION 1.90Å

e5qaiC2[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,VM7 ; X-RAY DIFFRACTION 1.90Å

e5qaiD2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,VM7 ; X-RAY DIFFRACTION 1.90Å

e5qajA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: VBC ; X-RAY DIFFRACTION 2.00Å

e5qajB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: VBC ; X-RAY DIFFRACTION 2.00Å

e5qajC2[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: VBC ; X-RAY DIFFRACTION 2.00Å

e5qajD1[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: VBC ; X-RAY DIFFRACTION 2.00Å

e5qakA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: AV4 ; X-RAY DIFFRACTION 1.90Å

e5qakB2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: AV4,EDO ; X-RAY DIFFRACTION 1.90Å

e5qakC2[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: AV4 ; X-RAY DIFFRACTION 1.90Å

e5qakD1[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: AV4 ; X-RAY DIFFRACTION 1.90Å

e5qalA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,TVZ ; X-RAY DIFFRACTION 1.95Å

e5qalB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,TVZ ; X-RAY DIFFRACTION 1.95Å

e5qalC2[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,TVZ ; X-RAY DIFFRACTION 1.95Å

e5qalD1[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,TVZ ; X-RAY DIFFRACTION 1.95Å

e5qamA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,GA6 ; X-RAY DIFFRACTION 1.87Å

e5qamB2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,GA6 ; X-RAY DIFFRACTION 1.87Å

e5qamC1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,GA6 ; X-RAY DIFFRACTION 1.87Å

e5qamD1[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,GA6 ; X-RAY DIFFRACTION 1.87Å

e5qanA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: M8Q ; X-RAY DIFFRACTION 2.30Å

e5qanB2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: M8Q ; X-RAY DIFFRACTION 2.30Å

e5qanC1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: M8Q ; X-RAY DIFFRACTION 2.30Å

e5qanD1[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: M8Q ; X-RAY DIFFRACTION 2.30Å

e5qaoA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: Z8R ; X-RAY DIFFRACTION 2.00Å

e5qaoB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: DMS,Z8R ; X-RAY DIFFRACTION 2.00Å

e5qaoC1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,Z8R ; X-RAY DIFFRACTION 2.00Å

e5qaoD1[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: Z8R ; X-RAY DIFFRACTION 2.00Å

e5qapA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO ; X-RAY DIFFRACTION 1.79Å

e5qapB2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: AV7,EDO ; X-RAY DIFFRACTION 1.79Å

e5qapC2[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: AV7,EDO ; X-RAY DIFFRACTION 1.79Å

e5qapD2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: AV7,EDO ; X-RAY DIFFRACTION 1.79Å

e5qaqA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO ; X-RAY DIFFRACTION 2.40Å

e5qaqB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,S1C ; X-RAY DIFFRACTION 2.40Å

e5qaqC1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: S1C ; X-RAY DIFFRACTION 2.40Å

e5qaqD2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,S1C ; X-RAY DIFFRACTION 2.40Å

e5qarA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: QIU ; X-RAY DIFFRACTION 2.10Å

e5qarB2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: QIU ; X-RAY DIFFRACTION 2.10Å

e5qarC1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: QIU ; X-RAY DIFFRACTION 2.10Å

e5qarD1[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: QIU ; X-RAY DIFFRACTION 2.10Å

Previous Next

e1xa1A1[A:56-151] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

REGULATORY PROTEIN BLAR1 ; ligands: PO4,POP ; X-RAY DIFFRACTION 1.8Å

e5crfA2[A:342-455] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Penicillin-binding protein 1A ; ligands: PO4 ; X-RAY DIFFRACTION 1.8Å

e2bg1A1[A:457-561] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PENICILLIN-BINDING PROTEIN 1B ; X-RAY DIFFRACTION 1.900Å

e4r1gA3[A:679-808] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Peptidoglycan glycosyltransferase ; ligands: CXU ; X-RAY DIFFRACTION 1.92Å

e3zg8B3[B:391-493] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PENICILLIN-BINDING PROTEIN 4 ; ligands: AIX,GOL ; X-RAY DIFFRACTION 2.09Å

e2waeA4[A:383-522] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PENICILLIN-BINDING PROTEIN 2B ; X-RAY DIFFRACTION 2.26Å

e3oclA3[A:291-411] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PENICILLIN-BINDING PROTEIN 3 ; ligands: CB9,CL ; X-RAY DIFFRACTION 2.3Å

e1pyyA2[A:334-455] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Penicillin-binding protein 2X ; ligands: OSU,SO4 ; X-RAY DIFFRACTION 2.42Å

e1nrfA1[A:399-494] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

REGULATORY PROTEIN BLAR1 ; X-RAY DIFFRACTION 2.44Å

e2c5wB1[B:367-470] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PENICILLIN-BINDING PROTEIN 1A ; ligands: CL,EDO,PCZ,ZN ; X-RAY DIFFRACTION 2.550Å

e5u2gA4[A:450-551] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Penicillin-binding protein 1A ; ligands: SO4 ; X-RAY DIFFRACTION 2.60Å

e2oluA1[A:395-502] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PENICILLIN-BINDING PROTEIN 2 ; X-RAY DIFFRACTION 2.9Å

e4oonA1[A:458-563] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Penicillin-binding protein 1A ; ligands: 2U4 ; X-RAY DIFFRACTION 3.2Å

F: Unmapped domains

Pseudo group of domains that do not map to PFam family profiles. Domains inside should not be considered as in one family.

beta barrelssingle beta-sheet folded upon itself to form a barrel

beta meanderssingle beta-sheet with mainly meander topology

beta sandwichestwo beta-sheets stacked together to form a sandwich

beta duplicates or obligate multimersbeta duplicates or monomers associate together to form a compact domain

beta complex topologybeta domains with complex and unique topology that cannot be described as barrel or sandwich or meander

a+b two layersone alpha-helix layer and one beta-sheet layer

a+b three layersone mainly antiparallel beta-sheet layer sandwiched between two alpha-helix layers

a+b four layerstwo beta-sheet layers sandwiched between two alpha-helix layers

a+b complex topologyalpha and beta domain with complex and unique topology that cannot be described in layers

a+b duplicates or obligate multimersalpha and beta duplicates or monomers associated together to form a compact domain

a/b barrelsrepeating beta-alpha units form a barrel

a/b three-layered sandwichesrepeating beta-alpha units form a sandwich with a mainly parallel beta-sheet layer stacked between two alpha-helix layers

mixed a+b and a/balpha and beta domain consists of both a+b and a/b regions

few secondary structure elementsstabilized by cofactors or disulfides

extended segmentsextended, non-globular segments, frequently bind to other proteins to form complexes